"The Axe-Fx Ultra TM is a “souped-up” version of the Axe-Fx. All the same great sounds but with a faster DSP and more memory. The Ultra TM contains a large selection of effects and sub-algorithms not present in the regular Axe-Fx and is geared toward serious studio and live use. The Ultra is equally at home in a FOH or studio effects rack as it is in a guitar rig. "